Digital Visual Interface - Digital display of high quality


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The digital interface provides the ability to produce high quality TV and advanced technology of projectors. The digital entertainment industry has grown considerably through the introduction of digital display working group (DDWG) and DVI technology, the evolution of LCD screens in computer monitors and projectors.

Speaking of these needs, we have a good overview of the evolution of digital technology. Before this technology was introducedvisual devices have been using the standard Video Graphics Array (VGA), were intended to be used in CRT monitors as well. The technology at issue is a source that produces horizontal lines to create images. At the same time, you can change the output voltage corresponding to the brightness. When the TRC receives the transmission, which will change the electron beam to scan the monitor. However, this approach shows no effect on the digital display, each pixel mustsampling to generate an appropriate display.

With the digital video interface technology, such distortions are no longer a problem. Instead of making adjustments to the output voltage to meet the brightness, which will shine and grab a binary code unique to each pixel. This method will ensure a perfect match between pixels in the source to the screen. Then the screen is free of distortion andnoise.

Basically DVI is formatted configuration based on the pixels that uses the serial transition minimized differential signaling (TMDS). All son colored green, blue, red and a clock signal are responsible for the transmission of 24 bits for each pixel. photographic images will be sent on each line at intervals no packages. In addition, this technology has no type of compression that has been a constant problem for oldertechnologies.

A single interface for a digital video link can support up to 2.6 megapixels at 60 Hz rate, but if the resolution is much greater, which is capable of using other links. There are two ways to connect this case, the only link with the screens that are less than 2.6 megapixels, while dual link need more pixels or 2.6 megapixels 24-bit. Unlike the light vehicle IG Open, this technology also supports analog and digital. The connectors are divided intofew categories: DVI-I digital and analog, DVI-A for analog only DVI-D and digital. In some cases, the DVI-D can work together with the High Definition Multimedia Interface (HDMI).

The minimum frequency required for the concept of DVI is 25.175 MHz, while the maximum is 165 MHz, however, the limit is set by the cable Dual Link mode. The pixels per clock cycle is a single-player and two dual-link. The bits per pixel of 24 terms commonly used in the doubleThus, it will be 48.

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